img{
    width: 100%;
    margin-bottom: 20px;
}
.iconfont{
    position: fixed;
    width: 30px;
    height: 30px;
    margin-top: 10px;
    margin-left: 10px;
    text-align: center;
    line-height: 30px;
}
#courseContent{
    height: 60px;
    padding: 0px 30px;
    border-bottom:1px solid #000 ;
}
#topTitle{
    margin-bottom: 10px;
}
#left{
    margin-left: 125px;
}
#courseBtn{
    width: 100%;
    height: 40px;
    background-color: #4294FF;
    border-radius: 20px;
    margin-top: 80px;
    text-align: center;
    line-height: 40px;
    color: #fff;
}
#courseData{
    margin-top: 30px;
}